/Engine/Source/Runtime/InteractiveToolsFramework/Public/BaseGizmos/IntervalGizmo.h
Called when the gizmo is notified about the start of a sequence of interval changes.
typedef TMulticastDelegate_OneParam< void, [UIntervalGizmo](API\Runtime\InteractiveToolsFramework\BaseGizmos\UIntervalGizmo) * > FOnBeginIntervalEdit